载噬菌体功能纳米纤维治疗绿脓假单胞菌和金黄色葡萄球菌创面感染。

Bacteriophage-loaded functional nanofibers for treatment of P. aeruginosa and S. aureus wound infections.

机构信息

Institute of Pharmaceutical Technology and Buchmann Institute for Molecular Life Sciences, Goethe University Frankfurt, Max-Von-Laue-Str. 9, 60438, Frankfurt am Main, Germany.

出版信息

Sci Rep. 2023 May 23;13(1):8330. doi: 10.1038/s41598-023-35364-5.

Abstract

The increasing incidence of infected skin wounds poses a major challenge in clinical practice, especially when conventional antibiotic therapy fails. In this context, bacteriophages emerged as promising alternatives for the treatment of antibiotic-resistant bacteria. However, clinical implementation remains hampered by the lack of efficient delivery approaches to infected wound tissue. In this study, bacteriophage-loaded electrospun fiber mats were successfully developed as next-generation wound dressings for the treatment of infected wounds. We employed a coaxial electrospinning approach, creating fibers with a protective polymer shell, enveloping bacteriophages in the core while maintaining their antimicrobial activity. The novel fibers exhibited a reproducible fiber diameter range and morphology, while the mechanical fiber properties were ideal for application onto wounds. Further, immediate release kinetics for the phages were confirmed as well as the biocompatibility of the fibers with human skin cells. Antimicrobial activity was demonstrated against Staphylococcus aureus and Pseudomonas aeruginosa and the core/shell formulation maintained the bacteriophage activity for 4 weeks when stored at - 20 °C. Based on these promising characteristics, our approach holds great potential as a platform technology for the encapsulation of bioactive bacteriophages to enable the translation of phage therapy into clinical application.

摘要

感染性皮肤伤口的发病率不断上升,这是临床实践中的一个主要挑战,尤其是当传统的抗生素治疗失败时。在这种情况下,噬菌体作为治疗抗生素耐药菌的有前途的替代品出现了。然而,由于缺乏有效的方法将噬菌体递送到感染的伤口组织中,临床应用仍然受到阻碍。在这项研究中,成功开发了负载噬菌体的静电纺纤维垫作为新一代的伤口敷料,用于治疗感染性伤口。我们采用同轴静电纺丝方法,用保护性聚合物壳层制造纤维,将噬菌体包裹在核心中,同时保持其抗菌活性。新型纤维表现出可重复的纤维直径范围和形态,而纤维的机械性能非常适合应用于伤口。此外,还证实了噬菌体的即时释放动力学以及纤维与人皮肤细胞的生物相容性。针对金黄色葡萄球菌和铜绿假单胞菌进行了抗菌活性测试,并且当以-20°C 储存时,核/壳制剂可将噬菌体的活性保持 4 周。基于这些有前途的特性,我们的方法作为一种用于封装生物活性噬菌体的平台技术具有很大的潜力,可将噬菌体治疗转化为临床应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2883/10205809/7fc2addd1f77/41598_2023_35364_Fig1_HTML.jpg

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